You don't mention which pavilion you have, nor your operating system, both of which would help to narrow down the problem, but have a look at this search result list from the HP support site, which will have the most detailed information available for your system. (click here). or go here, enter your pavilion #, then search solutions for "sound problem"Otherwise, there is a sound troubleshooter available for xp or vista at the MS help & how to. site that will help you determine the exact problem.Usually this error can be sorted out by going to the device manager and checking the condition of the sound device, then updating or rolling back the device drivers for your sound card (or whatever hardware device is not working properly). Sometimes you have to uninstall and reinstall the device, in which case you'll need to have the drivers cd that came with the system, or download the drivers from HP. In either case, here is a link to an excellent tutorial for updating windows drivers.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

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[Note CPU = Central Processing Unit. Another term used is Microprocessor, or simply Processor for short.Does NOT mean personal Computer.

This technology applies to YOUR motherboard, and not to motherboards that support the Intel Core i3, Core i5, Core i7, and Core i9, processors ]

However the Southbridge chip handles Audio through the Audio chipset.

Driver: Small piece of software that allows the Operating System to communicate with a device

The device is the Audio chipset.You didn't state what Windows O/S you are using.

The reason BIOS doesn't detect the Audio chipset, is because the Driver is gone. Audio driver.

(Windblows lost the address to the driver)

IF, I have the model number of the motherboard;Or,IF I have the manufacturer name of the computer, and it's model number;I can look to see if Audio drivers are available, and instruct you how to download, AND install.I also need the Operating System used.

hiiii ther
how r u ??
go to acer.com u will findall the vista update to ur driver
but 1st u need to check if ur machine is compatible with vista if it is
u will find all the update on the acer.com under ur laptop model
if u need any further assistance email me u take care and have fun salammmmmm {bye in arabic }p.s rate me thanks

You must have wrong sound driverdownload PCwizard and install this program will check motherboard for all your driver and list them sound driver will probably be in differnet section than main drivers note name and number of driverEG cmedia 23415 write down and search for them on the netcmediia 23415 drivers when found download correct drivers for your O/S.to uninstall old driver firstgo to start/control panel/system/hardware/device manager/right click on all sound drivers go to properties and uninstall driver reboot you must do this before installing new driver